Thermodynamics questions
1906 published questions with worked solutions.
- H for CaCO_3(s) CaO(s)+CO_2(g) is 176 kJ ,mol^ -1 at 1240 K. The U for the change is equal to
- The enthalpies of formation of N_2O and NO are 28 and 90 kJ mol⁻¹ respectively. The enthalpy of the reaction, 2N_2O(g)+O_2(g)...
- The change in the enthalpy during the reaction, NaOH+HCl NaCl+H_2O, is called
- The ionization energy of solid NaCl is 180 kcal per mole. The dissolution of the solid in water in the form of ions is...
- Given that standard heat (enthalpy of formation) of CH_4, C_2H_4 and C_3H_8 are -17.9, 12.5 and -24.8 kcal/mol. The H for...
- Enthalpy change for the reaction, 4H(g) 2H_2(g) is -869.6 kJ. The dissociation energy of the H─H bond is
- The heat change taking place during the reaction H_2O(l) H_2O(g) is [Given, H_f of H_2O(g)=-57 kcal, H_f of H_2O(l)=-68.3 kcal]
- The heats of neutralization of four acids A, B, C and D are -13.7, -9.4, -11.2 and -12.4 kcal respectively when they are...
- The heat of formation is the change in enthalpy accompanying the formation of a substance from its elements at 298 K and 1 atm...
- The heat of formation ( H_f) of H_2O(l) is equal to
- The enthalpy of formation of HI is 30.4 kJ (for 12H_2(g)+ 12I_2(g) HI(g), so that H_2(g)+I_2(g) 2HI(g); H=60.8 kJ). Which...
- The enthalpy changes of formation of the gaseous oxides of nitrogen (N_2O and NO) are positive because of
- The enthalpy change for the process, C(s) C(g) is known as enthalpy of
- The heat evolved during the combustion of 112 litre of water gas (a mixture of equal volumes of H_2 and CO) is: H_2(g)+ 12O_2(g)...
- In a flask, colourless N_2O_4 is in equilibrium with brown coloured NO_2. At equilibrium, when the flask is heated to 100°C, the...
- The heat of combustion for C, H_2 and CH_4 are -349.0, -241.8 and -906.7 kJ respectively. The heat of formation of CH_4 is
- Heat of formation of a compound is defined as
- If H_2(g)+Cl_2(g) 2HCl(g); H=-44 kcal 2Na(s)+2HCl(g) 2NaCl(s)+H_2(g); H=-152 kcal, then Na(s)+ 12Cl_2(g) NaCl(s); H^ =?
- The heat of neutralization of strong base and a strong acid is 57 kJ. The heat released when 0.5 mole of HNO_3 solution is added...
- If, S+O_2 SO_2; H=-298.2 kJ …(i) SO_2+ 12O_2 SO_3; H=-98.7 kJ …(ii) SO_3+H_2O H_2SO_4; H=-130.2 kJ …(iii) H_2+ 12O_2 H_2O;...
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Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration